HT3301 Syllabus - Handloom Weaving Technology - 2021 Regulation Anna University
HT3301 Syllabus - Handloom Weaving Technology - 2021 Regulation Anna University
HT3301 | HANDLOOM WEAVING TECHNOLOGY | LTPC |
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3003
COURSE OBJECTIVES:
• To enable the students to understand the principles of mechanisms of
handloom weaving such as primary, secondary and auxiliary motions,
preparatory processes, yarn packages etc
• To enable the students to perform calculations of yarn count, reed count and heald count
• To enable the students to gain the knowledge of the principles of working of various handloom dobbies
• To enable the students to perform calculations of yarn count, reed count and heald count
• To enable the students to gain the knowledge of the principles of working of various handloom dobbies
UNIT I | WEAVING PREPARATORY PROCESS | 9 |
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Yarn packages - hanks, cones, cheeses, and spools - Characteristics and
use; Essential characteristic of warp and weft, Objectives of winding and
warping, peg warping, vertical warping and sectional warping; objectives
and importance of sizing of cotton yarn, ingredients used in size mixture
for handloom industry and their functions, various forms of sizing- hank
sizing and street warp sizing; Characteristics of ideal sizing, common
defects during sizing- causes and remedies
UNIT II | SHEDDING AND PICKING MECHANISM | 9 |
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Evolution of handlooms, Various parts of a handloom and their functions,
types of handloomsThrow shuttle handloom, Fly shuttle pit loom and frame
loom; Relationship between type of handloom and the product, passage of
warp in frame loom; motions of a handloom; definitions of primary,
secondary & auxiliary, motions; Types of shed formations– centre closed
shed, bottom closed shed, top closed shed, open shed and semi open shed -
advantages, disadvantages and shedding devices; shedding mechanism of a
handloom using treadles and heald reversing motions – roller system,
pulley reversing system and jack and lam rod system
UNIT III | BEAT-UP AND SECONDARY MECHANISM | 9 |
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Picking mechanism of a handloom, types of shuttles – throw shuttle, fly
shuttle and roller shuttle, design and suitability; beat-up- open shed
beat-up, closed shed beat up and crossed shed beat-up in handlooms,
different types of reed – bamboo reed, steel reed and all metal steel
reed, suitability for various fabrics; let off motion in handlooms –
ratchet wheel and pawl, rope and weight, ropelever and weight motions;
take up motion in handloom – poker rod, ratchet wheel & pawl; auxiliary
motions of a handloom – temple motion and terry motion; handloom dobbies –
lattice dobby, barrel dobby and vertical dobby
UNIT IV | YARN NUMBERING SYSTEM | 9 |
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Introduction to numbering of yarns; indirect system of numbering of yarns
– New English cotton, New French, metric, worsted, woollen Yorkshire
Skein, linen, spun yarn, Direct system of numbering of yarns – Denier
metric, flax/ jute/ hemp, Universal system of yarn numbering – Tex and its
derivatives - millitex, kilotex; Determination of conversion factors,
Conversion of count of yarn -indirect to indirect, direct to direct,
indirect to direct, direct to indirect systems
UNIT V | YARN COUNT CACLCULATION | 9 |
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Determination of Equivalent/Resultant count of folded yarns with and
without contraction during twisting, costing of folded yarn, Average count
of warp. Read Count - dents per linear space and groups of dents per
linear space models, Stockport System of Reed count - relation between
reed counts, number of ends per dent, ends per inch, cloth width, reed
width and total number of ends, heald count calculations
TOTAL: 45 PERIODS
COURSE OUTCOMES:: Upon completion of the course, students will be able
to
Upon the completion of this course the student will be able to CO1:
Describe the yarn packages and the process of winding, warping and sizing
CO2: Explain the various parts, motions and shedding mechanism of handloom
CO3: Explain the various types of picking, beat up, let off and take up
mechanism CO4: Describe the direct and indirect yarn numbering systems
CO5: Explain the average count, reed count, heald count and its
calculations
TEXT BOOKS:
Sriramlu P.K., Ajgaonkar D.B. & Talukdar M.K., "Weaving Machines:
Mechanisms, Management", Mahajan Publishers, Ahmedabad, 1998. 2. Lord P.R.
and Mohammed M.H., "Weaving – Conversion of Yarn to Fabric", Merrow
Publication, 1992.
REFERENCES:
John A. Iredale “Yarn Preparation: A Hand Book”, Textile Institute,
Manchester, 1992, ISBN: 1853390429 2. Ormerod A. and Sondhelm W. S.,
“Weaving: Technology and Operations”, Textile Institute, 1995, ISBN:
187081276X.
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